Window-stop



C. O. BLOOMQUIST.

WINDOW STOP.

APPLICATION FILED JUNE 25, 1917 Patented Apr. 6 1920.

14 TTOR/VEY ing at Salt Lake City,

UNITED STATES PATENT OFFICE.

CHARLES O. BLOOMQUIST, 0F SALT LAKE CITY, UTAH.

WINDOW-STOP.

Application filed June 25, 1917.

To all whom it may concern:

Be it known that I, CHARLES 0. Bloom- QUIST, a citizen of the UnitedStates, residin the county of Salt Lake and State of Utah, have inventedcertain new and useful Improvements in Window-Stops, of which thefollowing is a specification.

My invention relates to window sash stops and has for its object toprovide an economical and efficient stop whereby the sliding of the sashof a window may be controlled and the distance which either sash may bemoved can be limited as desired.

These objects I accomplish with the device illustrated in theaccompanying drawings in which similar letters and numerals of referenceindicate like parts throughout the several figures and as described inthe specification forming a part of this application. and pointed out inthe appended claim.

In the drawings in which I have shown a substantial embodiment of myinvention Figure 1 is a plan view of the device. Fig. 2 is a perspectiveof the device in position to stop the movement of a window sash when itis in place thereon. Fig. 3 is an ele- 'V'atlOl'l of the device on aportion of a window sash and with my device thereon in position to stopthe passing of the sashes. Fig. 4; is an elevation of a portion of awindow sash and with my device thereon in position to allow the sashesto pass. Fig. 5 is an elevation of a window with my device shown thereonand the lower sash raised and stopped thereby. Fig. 6 is an elevation ofa window with my device thereon and showing the position when the sashis raised and not stopped by the device.

It is frequently desired to raise the lower sash of a window, or tolower the upper sash for ventilation and to secure the sash againstbeing raised far enough to admit a person crawling through the window,and the object of the present invention is to provide such a stop whichmay be quickly secured on the sash and may be easily and quicklyfastened into stopping position and which can not be released fromwithout the building. The device consists of a common hinge A a portionof the knuckles of one leaf A of which has been cut away, as at 1, andalso in which has been cut an elongated slot 2. On the other leaf A ofthe hinge is pivoted a dog 3 which has a knurled thumb piece 4 formed asa portion Specification of Letters Patent.

Patented Apr. 6, 1920.

Serial No. 176,894.

of the rivet and by which the said dog is operated. On the same leaf Aof said hinge to which the dog is pivoted is attached a stop piece 5 cutat one end to conform to the shape of one edge of the said dog andconforming to the adjacent portion of the said hinge leaf A to give itgreater thickness, at its other edges. The end portion of said dogthrough which the pivot is secured is shown at 6, and is cut eccentricwith two involute curves, one of which limits the throw of the dog inone direction and the contact of the inner edge of face of the dogagainst the back face of the leaf A limits the throw of the dog in theother direction, as the slot 2 is so positioned in relation to said dogthat the horizontal straight portion of said dog will not contact withthe end of said slot before the jaw of the dog contacts with the backface of the leaf A. hen the dog is swung to locking engagement, as justset forth, one of the involute curved portions of the dog willfrictionally engage with the inner curved wall provided by thedepression 6 in the upper end of the plate 5 with sufficient friction asto effect in holding the dog in looking position, while again when thedog is swung to unlocking position the second involute curve on the endportion of the dog will contact with the opposite end wall of the curveddepression 6 with sufficient friction as to hold the dog in suchunlocked position without the requirement of other means. When the saidhinge A has been fastened on the inner face of the upper sash of awindow contiguous the corner of said sash and the leaf A of the hinge A,is turned toward the glass of the window, either sash of the window maybe moved up or down without being engaged by the device, and thendesiring to secure the sash against movement, other than as desired, thesaid leaf A is turned toward the front and at right angles to the otherleaf A and the dog is made to engage within the said slot 2. In thisposition the said leaf A sticks out and prevents the two sashes frompassing and the sash may he only shifted vertically as far as saidhinge. That is, the upper sash may be lowered until the said stop piece5 strikes the lower sash, or the lower sash may be raised until itsupper edge strikes said stop piece 5. A slight turn of said dog 3 on itspivot, by turning the said thumb piece 4:,will release said dog from itsengagement in the said slot 2 and leave the said hinge leaf A free to beturned back out of the path of the lower sash, and when this is done thesash of the window may be shifted Vertically as desired. The cuttingaway of a small portion of the said leaf A, as at 1, allows the dog tobe pivoted contiguous the face of said leaf "A? and free to move on itspivot except as limited by the jaw of said dog 3 and the involute curvedportion 6. For convenience in construction a loose pin hinge is usedsuch, as a loose pin butt, the leaves of which. may be detached whileconstructing the device, and the portions of said leaf A may be cut awayas at 1, and 2, while the dog 3 and stop piece 5 are fastened on theother leaf A When assembled as shown in Fig. 1 and secured on the uppersash of the window, the device is ready for use and the said leaf A maybe turned to pass between the sashes as shown in Fig. 6 or to engage anditop the passing of the sashes as shown in Having thus described myinvention I desire to secure by Letters Patent and claim A window stopcomprising a loose pin hinged butt having a slot out in one leaf thereofand a portion of the knuckle of the said leaf cut away, a platecomprising a stop piece secured to the second leaf having its upper edgeapproximately in a line with the lower wall of the slot in the firstmentioned leaf, said stop piece having a concaved depression at itsupper end, a dog having a hook at one of its ends and its opposite endcut to provide two involute curves which is pivoted to the plateeccentrically with respect to the depressed portion in the stop piece,and whereby, when the leaves of the hinge are brought to right angularposition with respect to each other the said dog may be turned to bringthe hooked end thereof into the slot of the first mentioned leaf and theinvolute curve at one side of its inner end in frictional contact withone of the end walls of the curved depression in the stop plate, andsaid dog, when swung to an opposite or unlatching position designed tohave the second involute curve on the end thereof engage with theopposite end of the curved depression in the stop plate to frictionallyengage therewith and sustain the dog in unlatching position and anoperating knob secured to the pivot of the dog.

In testimony whereof Ihave affixed my signature.

CHARLES O. BLOOMQUIST.

